Delayed senescence of kiwifruit by p-coumaric acid pretreatment during storage at 20 °C: Toward regulating the ascorbate–glutathione cycle and phenolic anabolism

We conducted a comparative evaluation of different treatments for the bleaching of eucalypt kraft pulps beginning with OP stages. The treatments tested were (1) an acid chelation stage with DTPA (OQP sequence); (2) a hot acid stage (AOP sequence); and (3) a chelant addition into the alkaline oxygen stage ((OQ)P and A(OQ)P sequences). The latter strategy was also studied for environmental reasons, as it contributes to the closure of the filtrate cycle. The OQP sequence leads to the highest brightness gain and pulp viscosity and the lowest peroxide consumption caused by an efficient metals control. Considering that the low biodegradability of the chelant is a problem, the A(OQ)P sequence is an interesting option because it leads to reduced peroxide consumption (excluding OQP) while still reaching high brightness values and similar brightness reversion to OQP prebleaching, with only a viscosity loss of 160 dm3/kg. Therefore, a hot acid stage could be considered when a separate acid Q stage is absent in a prebleaching sequence of Eucalyptus globulus kraft pulps involving OP stages.

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Multiple gradient TLC and densitometric analysis ofp-coumaric acid in some medicinal plants from the familySolanaceae

JPC - Journal of Planar Chromatography - Modern TLC ◽

10.1556/jpc.16.2003.1.16 ◽

2003 ◽

Vol 16 (1) ◽

pp. 76-79 ◽

Cited By ~ 3

Author(s):

Loretta Pobłocka ◽

Grażyna Matysik ◽

Wojciech Cisowski

Keyword(s):

Medicinal Plants ◽

Coumaric Acid ◽

Densitometric Analysis

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p-COUMARIC ACID CONTENT IN SWEET PEPPER UNDER FARMING METHODS

Environmental Engineering and Management Journal ◽

10.30638/eemj.2016.196 ◽

2016 ◽

Vol 15 (8) ◽

pp. 1841-1848

Author(s):

Vasile Stoleru ◽

Daniela Cristina Dimitriu ◽

Andreia Corciova ◽

Laurian Vlase ◽

Teodor Stan ◽

...

Keyword(s):

Acid Content ◽

Sweet Pepper ◽

Coumaric Acid

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Elaboration of novel adsorbent from Moroccan oil shale using Plackett–Burman design

10.31221/osf.io/g7wfc ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Methylene Blue ◽

Oil Shale ◽

Screening Method ◽

Raw Material ◽

Coefficient Of Determination ◽

Processing Temperature ◽

Acid Pretreatment ◽

Experimental Data Processing ◽

Experimental Values ◽

Maximal Capacity

The new adsorbents were prepared from Moroccan oil shale by chemical and physical process .In this study, experimental Plackett-Burman has been used as a screening method to study six factors for the development of materials to adsorbent basis of oil shale Moroccan. The factors have been identified by two levels, To Know temperature (°C), Processing time (min), mass ratio (m precursor/m acid), Pretreatment mixture the precursor with acid, origin of the raw material and type of the activating agent (H2SO4, H3PO4).And it was chosen as a response The maximum quantity of adsorption of the molecule of Methylene blue (Qads in mg/g) and the specific surface measure by the method bet (Sbet in m2/g), The predicted values were in agreement with the experimental values with a coefficient of determination (R2) of 0.98. The model has been validated by experiments subsequent to optimized conditions. The experimental data processing by software JMP 7 showed that the processing temperature The report of oil shale on the acid and activation time were the important effect on the maximal capacity of adsorption of methylene blue. The sample prepared at 237 °C during 215 min with pre-processing has a maximal capacity of adsorption equal to 54mg/g according to model of adsorption of Langmuir and SBET equal to 143 m2/g.

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RESPONSES OF GLUTATHIONE CYCLE ENZYMES AND GLUTATHIONE METABOLISM TO 1-HEXYL-3-METHYLIMIDAZOLIUM STRESS IN SCENEDESMUS OBLIQUUS

Acta Hydrobiologica Sinica ◽

10.3724/sp.j.1035.2009.40696 ◽

2009 ◽

Vol 33 (4) ◽

pp. 696-701

Author(s):

Jian-Min MA ◽

Lin-Lin CAI ◽

Ling-Wei HU ◽

Tong-Xia JIN ◽

Xiao-Yu LI ◽

...

Keyword(s):

Scenedesmus Obliquus ◽

Glutathione Metabolism ◽

Glutathione Cycle

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Enzyme-assisted Extraction for Optimized Recovery of Phenolic Bioactives from Peganum hermala Leaves Using Response Surface Methodology

Current Topics in Nutraceutical Research ◽

10.37290/ctnr2641-452x.17:349-354 ◽

2018 ◽

Vol 17 (4) ◽

pp. 349-354

Author(s):

Qadir Rahman ◽

Anwar Farooq ◽

Amjad Gilani Mazhar ◽

Nadeem Yaqoob Muhammad ◽

Ahmad Mukhtar

Keyword(s):

Response Surface Methodology ◽

Response Surface ◽

Enzyme Concentration ◽

Coumaric Acid ◽

Assisted Extraction ◽

Pre Treatment ◽

Optimized Conditions ◽

Enzyme Complexes ◽

Hydrolysis Of ◽

Central Composite

This study investigates the effect of enzyme formulations (Zympex-014, Kemzyme dry-plus and Natuzyme) on recovery of phenolics from Peganum hermala (harmal) leaves, under optimized conditions using response surface methodology. As compared to the other enzyme complexes, the yield (34 g/100g) obtained through Zympex-014-assisted extraction was higher under optimized conditions such as time (75 min), temperature (70°C), pH (6.5) and enzyme concentration (5 g/100 g) using central composite design (CCD). Effectiveness of Zympex-014 towards hydrolysis of P. hermala leaves cell wall was examined by analyzing the control and enzyme-treated leave residues using scanning electron microscope (SEM). GC/MS characterization authenticated the presence of quercetin (1.44), gallic acid (0.23), caffeic acid (0.04), cinnamic acid (0.05), m-coumaric acid (0.23) and p-coumaric acid (0.37 μg/g) as the potent phenolics in Zympex-014 based extract. It can be concluded from the findings of the current work that pre-treatment of P. hermala leaves with Zympex-014 significantly enhanced the recovery of phenolics that supports its potential uses in the nutra-pharamaceutical industry.

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Antiperoxidative potential of p-coumaric acid, a common dietary phenol, in adjuvant-induced arthritis in rats

Journal of Chinese Integrative Medicine ◽

10.3736/jcim20120815 ◽

2012 ◽

pp. 932-938 ◽

Cited By ~ 8

Author(s):

SJ Pragasam

Keyword(s):

Coumaric Acid ◽

Adjuvant Induced Arthritis

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Effects of an Autoregulatory Senescence-inhibitor Gene Construct on Nicotiana alata Link and Otto.

HortScience ◽

10.21273/hortsci.33.3.519d ◽

1998 ◽

Vol 33 (3) ◽

pp. 519d-519 ◽

Cited By ~ 4

Author(s):

Kenneth R. Schroeder ◽

Dennis P. Stimart

Keyword(s):

Agrobacterium Tumefaciens ◽

Plant Height ◽

Dry Weight ◽

Nicotiana Alata ◽

Wild Type ◽

Gene Encoding ◽

Delayed Senescence ◽

Gene Construct ◽

Shoot Dry Weight ◽

Inhibitor System

Nicotiana alata Link and Otto. was transformed via Agrobacterium tumefaciens encoding a senescence-specific promoter SAG12 cloned from Arabidopsis thaliana fused to a Agrobacterium tumefaciens gene encoding isopentenyl transferase (IPT) that catalyzes cytokinin synthesis. This was considered an autoregulatory senescence-inhibitor system. In 1996, we reported delayed senescence of intact flowers by 2 to 6 d and delayed leaf senescence of transgenic vs. wild-type N. alata. Further evaluations in 1997 revealed several other interesting effects of the SAG12-IPT gene construct. Measurement of chlorophyll content of mature leaves showed higher levels of both chlorophyll a and b in transgenic material under normal fertilization and truncated fertilization regimes. At 4 to 5 months of age transgenic plants expressed differences in plant height, branching, and dry weight. Plant height was reduced by 3 to 13 cm; branch counts increased 2 to 3 fold; and shoot dry weight increased up to 11 g over wild-type N. alata. These observations indicate the system is not tightly autoregulated and may prove useful to the floriculture industry for producing compact and more floriferous plants.

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α-Glucosidase Inhibition and Docking Studies of 5-Deoxyflavonols and Dihydroflavonols Isolated from Abutilon pakistanicum

Current Organic Chemistry ◽

10.2174/1385272823666191001224741 ◽

2019 ◽

Vol 23 (17) ◽

pp. 1857-1866

Author(s):

Munawar Hussain ◽

Zaheer Ahmed ◽

Shamsun N. Khan ◽

Syed A. A. Shah ◽

Rizwana Razi ◽

...

Keyword(s):

Methanolic Extract ◽

Docking Studies ◽

Hydroxyl Group ◽

Coumaric Acid ◽

In Vitro Activity ◽

Aerial Parts ◽

First Time ◽

Acid Esters ◽

Phenol Moiety

Three new 5-deoxyflavonoid and dihydroflavonoids 2, 3 and 4 have been isolated from the methanolic extract of Abutioln pakistanicum aerial parts, for which structures were elucidated explicitly by extensive MS- and NMR-experiments. In addition to these, 3,7,4′-trihydroxy-3′-methoxy flavonol (1) is reported for the first time from Abutioln pakistanicum. Compound 2 and 4 are p-coumaric acid esters while compounds 2–4 exhibited α-glucosidase inhibitory activity. Docking studies indicated that the ability of flavonoids 2, 3 and 4 to form multiple hydrogen bonds with catalytically important residues is decisive hence is responsible for the inhibition activity. The docking results signified the observed in-vitro activity quite well which is in accordance with previously obtained conclusion that phenol moiety and hydroxyl group are critical for the inhibition of α-glucosidase enzyme.

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